Rear bumper



FIG. 1 is a front view of a rear bumper showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side perspective view thereof;

FIG. 4 is a right side perspective view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

It will be understood that the broken lines shown in the drawingsillustrate portions of the rear bumper that form no part of claimeddesign.

CLAIM The ornamental design for a rear bumper, as shown and described.